Département de physique | Université de Sherbrooke

Skip to Main Content Area

Prochains séminaires

lun, 05/27/2013 - 12:30

Susanne Butz, Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe, Germany.
- 12:30
- D3-2040
- Title: A Tunable Josephson Metamaterial
  
  Abstract: We present experimental data on a tunable magnetic metamaterial consisting of rf-SQUIDs. A metamaterial is a medium constructed of artifical elements, so- called meta-atoms, that interact in a specific way with an incoming electromagnetic wave. The size of and the distance between the individual meta-atoms is much smaller than the wavelength. Our metamaterial consists of one-dimensional arrays of 27 rf-SQUIDs, one chain placed inside each of the gaps of a coplanar waveguide. Due to the nonlinear inductance of the rf-SQUID, its resonance frequency is tunable in situ by applying a dc magnetic field. We demonstrate that this results in tunable effective parameters of our metamaterial. In order to obtain the effective magnetic permeability from the measured data, we employ a technique that uses only the complex transmission coefficient S21.
- Voir Google Calendar

lun, 06/03/2013 - 12:30

Bhaskar Roy Bardhan, Department of Physics and Astronomy, Louisiana State University
- 12:30
- D3-2040
- To be annonced
- Voir Google Calendar

mer, 06/05/2013 - 10:45

INTRIQ : Lilian Childress, McGill
- 10:45
- D1-2165
- Title: Spins and photons: toward quantum networks in diamond
  
  Abstract: Long-lived electronic and nuclear spin states have made nitrogen-vacancy (NV) defects in diamond a leading candidate for solid-state quantum information processing. Moreover, their coherent optical transitions open opportunities for quantum communication. This talk will consider the motivation and requirements for optically-networked quantum devices, and explore challenges and opportunities for realizing them in diamond. In particular, the resonant excitation and emission in these defect centers enables single shot spin detection as well as observation of two-photon quantum interference; these two capabilities have enabled measurement-based entanglement between remote NV centers.
- Voir Google Calendar

lun, 06/10/2013 - 12:30

Frank Verstraete , Université de Vienne
- 12:30
- D3-2040
- To be announced
- Voir Google Calendar

mar, 06/11/2013 - 00:00

Wolfgang Belzig, l'Université de Constance, Allemagne
- Voir Google Calendar

Langan RM, Gordeev SN, Oussena M, De Groot PA, Jansen AG, Gagnon R, et al. Scaling behaviour of magneto-resistance in clean YBa2Cu3O7-δ single crystals in the vortex liquid state. Physica C: Superconductivity and its Applications. 1999;313:294-304.

Kokkaliaris S, Deligiannis K, Oussena M, Zhukov AA, De Groot PA, Gagnon R, et al. Effect of oxygen stoichiometry on the out-of-plane anisotropy of YBa2Cu3O7-δ single crystals near optimal doping. Superconductor Science and Technology. 1999;12:690-3.

Kokkaliaris S, Gordeev SN, De Groot PA, Gagnon R, Taillefer L, Henry PF, et al. Peak effect and oxygen ordering in YBa2Cu3O7-δ single crystals. Physica C: Superconductivity and its Applications. 1999;320:161-6.

Krishana K, Ong NP, Zhang Y, Xu ZA, Gagnon R, Taillefer L. Quasiparticle thermal Hall angle and magnetoconductance in YBa2Cu3Ox. Physical Review Letters. 1999;82:5108-11.

Rassau AP, Gordeev SN, De Groot PA, Gagnon R, Taillefer L. Dynamic stability of the vortex solid state of YBa2Cu3O7-δ single crystals. Physica C: Superconductivity and its Applications. 1999;328:14-20.

Kokkaliaris S, De Groot PA, Gordeev SN, Zhukov AA, Gagnon R, Taillefer L. Onset of plasticity and hardening of the hysteretic response in the vortex system of YBa2Cu3O7-δ. Physical Review Letters. 1999;82:5116-9.

Chiao M, Hill RW, Lupien C, Popić B, Gagnon R, Taillefer L. Quasiparticle transport in the vortex state of YBa2Cu3O6.9. Physical Review Letters. 1999;82:2943-6.

Rassau AP, Gordeev SN, De Groot PA, Gagnon R, Taillefer L. Dynamic Transitions within the Vortex Solid of YBa2Cu3Oy, Single Crystals. Journal of Low Temperature Physics. 1999;117:1507-11.

Gordeev SN, Bracanovic D, Rassau AP, De Groot PA, Gagnon R, Taillefer L. Current-induced resistivity switching effects near the melting line in detwinned YBa2Cu3O7-δ. Physical Review B. 1998;57:645-8.

Crisan A, Gordeev SN, Manton S, Rassau AP, Popa S, Beduz C, et al. Investigations of the zero-field (a, b)-plane conductivity of YBa2Cu3O7-δ near the critical temperature. Physica C: Superconductivity and its Applications. 1998;309:1-7.

login